Unforgettable New episodes of this mystery series return as Al and Carrie (Dylan Walsh, Poppy Montgomery) pose as a married couple in hopes of luring in a killer. Jane Curtin and Dallas Roberts also star. 8 p.m. CBS

Hawaii Five-0 Fans helped build this new episode, voting on key elements of the story, wardrobe, music and more. Rob Corddry guest stars as a struggling magician, and Jorge Garcia returns in his role as a conspiracy theorist. 9 p.m. CBS

Hart of Dixie Zoe and Joel (Rachel Bilson, Josh Cooke) hit one snag after another as they try to remodel their new home in this new episode. 9 p.m. KTLA